38 Top Gun winter upgrades
03-31-2021 | 11:23 AM
#21
Registered
Joined: Jun 2010
Posts: 4,806
Likes: 891
are you concerned about stress risers in the necked down area of the new shafts?
03-31-2021 | 01:58 PM
#22
Platinum Member
Joined: Jan 2005
Posts: 1,156
Likes: 518
From: Owen Sound Ont.
n updated version of the Mercury Racing III SSM drive, the III-A SSM drive features larger vertical bearings in the upper housing. The larger bearings provide increased rigidity for the driven gear, resulting in increased bearing capacity and longer life. Larger driveshaft splines provide greater strength, while larger pinion bearings hold lower bevel gears more rigidly, resulting in increased bearing life. A larger propeller shaft increases drive strength and is rear loading for improved shaft contact with the propeller. An extended “nose” on the gearcase improves water flow and boat handling.
Features & Benefits
Large driveshaft splines provide greater torsional strength.
Large vertical bearing in the upper housing provide increased rigidity for the driven gear and longer life.
Large pinion bearings hold lower level gears more rigidly resulting in increased bearing life.
Large propeller shaft is rear loading for improved shaft contact with the propeller.
Input ratings are 750 HP and up to 750 foot pounds of torque.
Extended nose on the gearcase improves water flow and boat handling.
I never had a problem with the 3A's and I had over 900HP. Plus the 26 Spline shaft opens up the book to better prop selection, more blades and dialing in versus hard to find 19 spline and or adaptors.
Features & Benefits
Large driveshaft splines provide greater torsional strength.
Large vertical bearing in the upper housing provide increased rigidity for the driven gear and longer life.
Large pinion bearings hold lower level gears more rigidly resulting in increased bearing life.
Large propeller shaft is rear loading for improved shaft contact with the propeller.
Input ratings are 750 HP and up to 750 foot pounds of torque.
Extended nose on the gearcase improves water flow and boat handling.
I never had a problem with the 3A's and I had over 900HP. Plus the 26 Spline shaft opens up the book to better prop selection, more blades and dialing in versus hard to find 19 spline and or adaptors.
I have 3's so I can't fully appreciate the upgrades
04-01-2021 | 06:16 PM
#23
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
04-01-2021 | 06:18 PM
#24
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
n updated version of the Mercury Racing III SSM drive, the III-A SSM drive features larger vertical bearings in the upper housing. The larger bearings provide increased rigidity for the driven gear, resulting in increased bearing capacity and longer life. Larger driveshaft splines provide greater strength, while larger pinion bearings hold lower bevel gears more rigidly, resulting in increased bearing life. A larger propeller shaft increases drive strength and is rear loading for improved shaft contact with the propeller. An extended “nose” on the gearcase improves water flow and boat handling.
Features & Benefits
Large driveshaft splines provide greater torsional strength.
Large vertical bearing in the upper housing provide increased rigidity for the driven gear and longer life.
Large pinion bearings hold lower level gears more rigidly resulting in increased bearing life.
Large propeller shaft is rear loading for improved shaft contact with the propeller.
Input ratings are 750 HP and up to 750 foot pounds of torque.
Extended nose on the gearcase improves water flow and boat handling.
I never had a problem with the 3A's and I had over 900HP. Plus the 26 Spline shaft opens up the book to better prop selection, more blades and dialing in versus hard to find 19 spline and or adaptors.
Features & Benefits
Large driveshaft splines provide greater torsional strength.
Large vertical bearing in the upper housing provide increased rigidity for the driven gear and longer life.
Large pinion bearings hold lower level gears more rigidly resulting in increased bearing life.
Large propeller shaft is rear loading for improved shaft contact with the propeller.
Input ratings are 750 HP and up to 750 foot pounds of torque.
Extended nose on the gearcase improves water flow and boat handling.
I never had a problem with the 3A's and I had over 900HP. Plus the 26 Spline shaft opens up the book to better prop selection, more blades and dialing in versus hard to find 19 spline and or adaptors.
04-01-2021 | 07:35 PM
#26
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
04-27-2021 | 06:12 AM
#27
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
First trip out 2 weeks ago with 3A's same props as last year seem same speeds as my 1.58 at cruise, no WOT test yet. I would have thought I would lose some mph going to 1.68?
got a set of 3 blades with them I'm gonna compare this weekend, dude said the apache loved them.. stay tuned
got a set of 3 blades with them I'm gonna compare this weekend, dude said the apache loved them.. stay tuned
04-30-2021 | 04:37 PM
#30
Registered
Joined: Oct 2000
Posts: 1,254
Likes: 44
From: Toronto Canada
Tim , looking good . I am kinda sorry I got rid of the Hawk off my Flat deck . If you ever get out on lake Ontario let me know . Toronto by water is pretty cool . Lots of spots to boat to for a freshment or 2 . Cheers RG.
